package com.atguigu.lease.web.app.service.impl;


import com.atguigu.lease.common.constants.RedisConstant;
import com.atguigu.lease.common.result.ResultCodeEnum;
import com.atguigu.lease.common.springmvc.leaseException;
import com.atguigu.lease.common.utils.JwtUtil;
import com.atguigu.lease.model.entity.UserInfo;
import com.atguigu.lease.model.enums.BaseStatus;
import com.atguigu.lease.web.app.service.LoginService;
import com.atguigu.lease.web.app.service.UserInfoService;
import com.atguigu.lease.web.app.vo.user.LoginVo;
import com.atguigu.lease.web.app.vo.user.UserInfoVo;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import org.checkerframework.checker.units.qual.A;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;

import java.util.Random;
import java.util.concurrent.TimeUnit;

@Service
public class LoginServiceImpl implements LoginService {


    @Autowired
    private RedisTemplate<String,Object> redisTemplate;

    @Autowired
    private UserInfoService userInfoService;

    @Override
    public void sendCode(String phone) {

        String key = RedisConstant.APP_LOGIN_PREFIX + phone;

        Boolean hasKey = redisTemplate.hasKey(key);

        if (hasKey) {
            //0.检查该手机号是否已经发送，且在有效期内.
            //3
            Long expire = redisTemplate.getExpire(key, TimeUnit.SECONDS);
            //1
            Integer appLoginCodeTtlSec = RedisConstant.APP_LOGIN_CODE_TTL_SEC;
            //2
            Integer appLoginCodeResendTimeSec = RedisConstant.APP_LOGIN_CODE_RESEND_TIME_SEC;

            if (appLoginCodeTtlSec - expire < appLoginCodeResendTimeSec){
                throw new leaseException(ResultCodeEnum.APP_SEND_SMS_TOO_OFTEN);
            }
        }
        //1.生成验证码
        StringBuilder sb = new StringBuilder();
        Random random = new Random();
        for (int i = 0; i < 6; i++) {
            sb.append(random.nextInt(10));
        }
        String code = sb.toString();
        System.out.println("验证码 = " + code);
        //2.存储到redis中[有效期]
        redisTemplate.opsForValue().set(key,code, RedisConstant.APP_LOGIN_CODE_TTL_SEC,TimeUnit.SECONDS);
        //3.发送/不发送 验证码
    }

    @Override
    public String login(LoginVo loginVo) {
//        接收前端手机号和验证码
//        判断验证码是否正确
        String key = RedisConstant.APP_LOGIN_PREFIX + loginVo.getPhone();
        String code = (String) redisTemplate.opsForValue().get(key);
        if (code == null || !code.equals(loginVo.getCode())) {
            throw new leaseException(ResultCodeEnum.APP_LOGIN_CODE_ERROR);
        }
//        正确 登录或者注册
        LambdaQueryWrapper<UserInfo> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.eq(UserInfo::getPhone, loginVo.getPhone());
        UserInfo userInfo = userInfoService.getOne(lambdaQueryWrapper);
//        手机号到数据库查询用户
        if (userInfo == null) {
            //注册
            userInfo = new UserInfo();
            userInfo.setPhone(loginVo.getPhone());
            //默认头像
            userInfo.setAvatarUrl("http://www.baidu.com/img/bd_logo.png");

            userInfo.setNickname("佚名" + loginVo.getPhone().substring(7));
            userInfo.setStatus(BaseStatus.ENABLE);
            userInfoService.save(userInfo);
        }
//        判断用户是否可用
        if (userInfo.getStatus() == BaseStatus.DISABLE){
            throw new leaseException(ResultCodeEnum.APP_ACCOUNT_DISABLED_ERROR);
        }
//        可用 jwt->token->返回
        String token = JwtUtil.createToken(userInfo.getId(),userInfo.getPhone());
        return token;
    }

    @Override
    public UserInfoVo info(String accessToken) {
        //1.解析userId
        Integer userId  = (Integer) JwtUtil.parseToken(accessToken).get("userId");
        //2.根据userId查询
        UserInfo userInfo = userInfoService.getById(userId);
        //3.封装vo
        UserInfoVo userInfoVo = new UserInfoVo(userInfo.getNickname(),userInfo.getAvatarUrl());
        return userInfoVo;
    }
}
